Extrinsic Spin Hall Effect from First Principles

被引：127

作者：

Gradhand, Martin ^{[1
,2
]}

Fedorov, Dmitry V. ^{[2
]}

Zahn, Peter ^{[2
]}

Mertig, Ingrid ^{[1
,2
]}

机构：

[1] Max Planck Inst Mikrostrukturphys, D-06120 Halle, Germany

[2] Univ Halle Wittenberg, Inst Phys, D-06099 Halle, Germany

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 18期

关键词：

ELECTRICAL-TRANSPORT PHENOMENA; QUANTUM-THEORY; RANDOM ALLOYS; FERROMAGNETICS; SEMICONDUCTORS;

D O I：

10.1103/PhysRevLett.104.186403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present an ab initio description of the spin Hall effect in metals. Our approach is based on density functional theory in the framework of a fully relativistic Korringa-Kohn-Rostoker method and the solution of a linearized Boltzmann equation including the scattering-in term (vertex corrections). The skew scattering mechanism at substitutional impurities is considered. Spin-orbit coupling in the host as well as at the impurity atom and the influence of spin-flip processes are fully taken into account. A sign change of the spin Hall effect in Cu and Au hosts is obtained as a function of the impurity atom, and even light elements like Li can cause a strong effect. It is shown that the gigantic spin Hall effect in Au can be caused by skew scattering at C and N impurities which are typical contaminations in a vacuum chamber.

引用

页数：4

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